98 1.4 Megane wont start?

Hi,I wonder if anyone could help please? I have a 98 megane 1.4 which has developed a fault today. When driving it earler the red alarm/immobiliser light on the dash was flashing, I parked up and when i went back to the car i turned the ignition and it turned over but wont start, theres also an orange light flashing on the right of the dash which i think is engine management, any answers would be VERY much appreciated, many thanks

Read more: http://www.justanswer.com/questions/1bj5q-97-renault-megane-wont-start#ixzz0HTdXH7Gj&B